package com.ybu;

import java.util.*;

/**
 * @ProjectName: shixun
 * @Titile: CollectionsDemo
 * @Author: Jie
 * @Description: TODO
 */
public class CollectionsDemo {
    public static void main(String[] args){
        test1();
    }
    private static void test0(){
        List<String> list  = new ArrayList<>();
        Collections.addAll(list,"张三","李四","王五","赵六");
        list.forEach(System.out::println);

        //打乱集合顺序
        Collections.shuffle(list);
        list.forEach(System.out::println);
    }

    public static void test1(){
        List<Integer> list = new ArrayList<>();
        Collections.addAll(list,1,2,3,4,5,6,7,8,9,10);
        //按照倒序给集合排序
        Collections.sort(list);
        list.forEach(System.out::println);
        Collections.sort(list,(o1, o2)-> {
            //安装倒序排
            return o2-o1;
        });
        System.out.println("----------------------");
        list.forEach(System.out::println);
        //让学生Student实现Comparable接口，这样也能给学生排序
        List<Student> list1 = new ArrayList<>();
        list1.add(new Student("赵六",22));
        list1.add(new Student("张三",20));
        list1.add(new Student("王五",18));
        Collections.sort(list1);
        list1.forEach(System.out::println);


    }
}
